I am a current user of Klipsch S4. With a budget of $100, I am considering an upgrade to UE 6000 (from Amazon). Just wondering if anyone switched from Klipsch S4 to UE 6000? Is it considered an upgrade in terms of sound quality? How is the noise cancellation? I am worried the S4 isolation is better than the UE 6000's noise cancellation.
Orelse, with the budget of $100, is there any other models anyone can recommend?